※日本語は下の方にあります。

This is a Embeded OS for PIC32MX270F256B based on Japanese "KOZOS" which is developped for learning and hobby.
This repositry consists of that bootloader and OS. This OS is developped with full scratch programing and bare metal programing.

KZLOAD(kozos boot loader) loads firmware on RAM memory by XMODEM transfer and execute that.
The loaded file must be hex file format.

KOZOS has functions like below.

• Memory Management
• Thread Managemnt
  • Multi Task
  • Message Box

And has drivers like below.

• Serial Driver
• Timer Driver

Displayed charactors on the led panel can be changed from PC by contacting with serial.
I will upload this source code after several weeks.

• mips-elf-gcc
  It may be possible to use XC32-compiler and pinguino-compiler.I don't have checked yet.
  I installed with this command.
  $ ../gcc-7.2.0/configure --prefix=(your install directry) --target=mips-elf --disable-nls --disable-threads --disable-shared --enable-languages=c --disable-bootstrap --disable-libssp
$ make -j4
$ make install

• binutils
  The original mips-elf-objdump has a bug which disable to convert elf files to other format files.
  Please use this one fixed the bug.
  You can find p32-objdump in pinguino-compilers/(Your OS version)/p32/bin/ directory.
  And rename to mips-elf-gcc or change Makefile.

• Terminal Emulator
  For example, Tera Term and minicom.

  • Setting

• Target Board
  KOZOS-PIC has been tested on PIC32MX270F256B.
  So you need such the above board or the compatible board.

• Serial conversion cable
  Of course, if your computer has a serial port, you don't need it.

To build this OS, please run the following command.
$ cd bootload
$ make
$ cd ../
$ cd os
$ make

In your serial console, please run the following command.

1. kzload> load

2. Send os/kozos.hex by xmodem transfer.

3. kzload> run

KOZOS-PIC is released under MIT license.

If you are find something wrong with this OS or my English, please tell me because I am beginner at programing and English.Of course, I welcome your quetions,too.
Twitter : @envzhu

　ここで学習用組込みOS「KOZOS」をPIC(MIPS)に移植して、それを発展させたものです。 ターゲットはPIC32MX270F256Bを想定しています。

※気が向いたら見やすいように書き直します